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. 2021 Jan 6;15:1–15. doi: 10.2147/BTT.S285610

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© 2021 Fitzgerald et al.

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Patient selection.

Notes: ^aDiagnosis was identified using the following ICD-9 CM and ICD-10 CM codes: RA (ICD-9 CM code 714.0; ICD-10 CM code: M05.1-M05.9, M06), PsA (ICD-9 CM code 696.0; ICD-10 CM code: L40.5x), PsO (ICD-9 CM code 696.1; ICD-10 CM code: L40.0-L40.4, L40.8, L40.9), or AS (ICD-9 CM code 720.0; ICD-10 CM code: M45.x), CD (ICD-9 CM code 555.x; IDC-10 CM code K50.x), UC (ICD-9 CM code 556.x; IDC-10 CM code K51.x). ^bOriginator IFX was identified using the GPI code 5250504000 and HCPCS code J1745. IFX biosimilars were identified using the following codes: infliximab-abda (GPI code 5250504010; HCPCS code Q5102, Q5103), infliximab-dyyb (GPI code 5250504020; HCPCS code Q5102, Q5104), and infliximab-qbtx (GPI code 5250504060). ^cPregnancy was identified using the ICD-9 CM code V22.x and ICD-10 CM codes Z33.x and Z34.xx. ^dDiagnosis of heart failure was identified using the ICD-9-CM code 428.xx and ICD-10-CM code I50.x.

Abbreviations: AS, ankylosing spondylitis; CD, Crohn’s disease; GPI, Generic Product Identifier; HCPCS, Healthcare Common Procedure Coding System; ICD-9 CM/ICD-10 CM, international classification of disease, ninth/tenth revision, clinical modification; IFX, infliximab; PsA, psoriatic arthritis; PsO, plaque psoriasis; RA, rheumatoid arthritis; UC, ulcerative colitis.